Edging device.



No. 664,530. Patented Dec. 25, I900.

I J. P. BROWN.

EDGING DEVICE.

(APPlication filed Oct. 1, 1900.

(No Model.)

UNITED STATES PATENT Omen JOHN P. BROWN, OF CHICAGO, ILLINOIS.

EDGING DEVICE.

SPECIFICATION refillin part of rates Patent No. 664,530, dated December25, 1900.

Application filed October 1, 1900. Serial No. 31,675. (No model.)

To aZZ whom it may concern.-

Be itknown that I, JOHN P. BROWN, of Chicago, in the county of Cook andState of Illinois,have invented certain new and useful Improvements inEdging Devices; and I do hereby declare that the following is a full,clear, and exact description thereof, reference being had to theaccompanying drawings, and to the letters of reference marked thereon,which form a part of this specification.

This invention relates to a novel device for edging lumber preparatoryto matching same; and the invention consists in the matters hereinafterset forth, and more particularly pointed out in the appended claims.

My invention may be embodied in an attachment for an ordinarysawingmachine comprising a flat'saw-table and a circular rip or edgingsaw projecting upwardly therethrough, the saw-table being cut away toreceive the attachment and said attachment being so made that when thesaw is not used as an edging-saw all the operative parts of the deviceare located at or below the plane of the saw-table, so as not tointerfere with the usual operation of the saw. Moreover, the inventionmay be embodied in a machine constructed for edging purposes alone.

In the drawings, Figure 1 is a plan view of a saw-table provided with myedging attachment. Fig. 2 is a longitudinal section thereof with thecarriage moved inwardly from the position shown in Fig. 1. Fig. 3 is anend view of the parts shown in Fig. 2. Fig. 4 is a perspective view ofthe operating-lever detached from its associated parts. Figs. 5 and 6are end and side elevations, respectively, of a gripping-lever whichcooperates with the operating-lever to look a board in place on thedevice.

As shown in said drawings, Adesignates a saw-table, which may be of anyusual or preferred construction; B, a circular rip or edging sawprojecting upwardly through a slot in the table; B, an arbor on whichsaid saw is mounted, and B a pulley through which rotary motion is givento the arbor.

My improved edging attachment consists, essentially, of a carriage whichtravels in a path atone side of and parallel with the saw B andconstructed to hold a board to be edged firmly at the level of the uppersurface of the saw-table and to guide the board accurately to the saw asthe same is moved forward by the carriage, whereby after the board hasbeen locked on the carriage no special skill or attention is requiredfrom the operator to guide the same to the saw to make a straight cut.4,

The carriage consists, as herein shown, of two parallel bars 0 0,connected together by interposed blocks 0, located between the endsthereof, and an intermediate block 0'. Said blocks and bars areconnected by screws in the manner shown in Fig. 2. separated adistancefrom each other, thereby providing a longitudinal space betweenthe same for the location of the devices for holding the board on thecarriage. The carriage fits and slides in a groove A, formed in thesaw-table, and the bars 0 are provided on their outer lateral surfaceswith tongues 0 adapted to engage gu ide-grooves stationary with theadjacentedges of the table. a When the device is formed as an attachmentto be applied to a sawing-machine, said grooves are formed inlongitudinal guide-rails D D, which are secured to the proximate marginsof the cut-away portions A of the table by screws or like means, asshown in Figs. 2 and 3; but when said device forms a permanent part ofthe saw-table said grooves may be formed in the proximate edges of thesaid cut-away portion A and without the intervention of the guide-railsD. The parts described are so constructed and arranged that the upper surfaces of the carriage-bars O O are located in the plane of the uppersurface of the saw-table, so that when the machine is to be used forother purposes than edging lumber the device presents no obstructionswhich rise above the level of the table.

The locking devices by which the board is held in position on thecarriage consists of a lever E, pivoted at its lower end between thecarriage-bars adjacent to one end of the carriage, a second lever F,similarly pivoted between the carriage-bars adjacent to the other end ofthe carriage, and a connecting-rod G, extending between and pivoted,respectively, at its opposite ends to the levers E F, whereby movementof one of said levers will cause a corresponding and desired movement ofthe other lever. The lever E is elongated and The bars are constructedto serve as an operating-lever to lock the board to the carriage andrelease the same therefrom. to the carriage through the medium oftransverse pivot-pins e f, secured at their opposite ends to thecarriage-bars and passing through the levers. The connecting-rod Gispivoted at its opposite ends, respectively, to the levers E F throughthe medium of pivot-pins g g. Said connecting-rod is pivoted to thelever E at a point below its fulcrum and is pivoted to the lever F at apoint above its fulcrum f, whereby the lever E is one of the first classand the lever F one of the second class. With this construction when thelever E is swung toward the pivot of the lever F it will cause the freeend of the lever F to swing toward the lever E, so that when a board isplaced on the carriage between said levers and the lever E swung againstthe adjacent end margin of the board the lever F is swung against theopposite end margin of the board and said board clamped firmly on thecarriage between the levers. Desirably both of said levers are providedwith laterally-separated knife-edges to engage the board. The lever F isconveniently made of two similar parts f f and an interposed block f thethree parts being joined by screws, as shown in Figs. 5 and 6. Thecontact-faces of the lever E for this purposeis shown as provided with agroove e, at the sides of which the knifeedges are formed.Theconstruction of the lever F aflords between the parts thereof spacefor the location of the pivoted end of the connecting-rod G, and thelever E for this purpose is provided at its lower end with a groove,within which the adjacent end of the rod is pivoted, said spaces orgrooves permitting free movement of the rod with respect to said levers.

In order to provide for different lengths of lumber, the carriage-barsare provided with a plurality of pivot-apertures 0 Fig. 2, to permit thedistance between the levers E and F to be varied, and the connecting-rodis provided with corresponding apertures g for engagement of the lever Ftherewith.

It will be observed by reference to Fig. 2 that the levers E andF may bethrown down below the surface of the carriage, as indicated in dottedlines in Fig. 2, the connecting-block 6, adjacent to the lever E, beingcut away on its top surface to receive said lever. When the lovers arein theposition so indicated in dotted lines, all parts of the device areflush with the surface of the table, so that said table may be used forthe usual purposes of a sawing-machine.

The lever E is desirably provided with a gage H, extending laterallytoward the saw, with its outer end just inside of the plane of the saw,and which enables the operator to adjust the board in position on thecarriage to. permit the proper amount of stock to be cutfrom the board.The guide-rail and table on the side of the lever adjacent to the Saidlevers E F are pivoted gage are provided with a groove a to receive thegage when the parts are in the positions indicated in dotted lines inFig. 2.

The carriage is shown in Fig. 1 in the position which it occupies when aboard is to be locked thereto preparatory to moving the same toward thesaw. The carriage and board are moved toward the saw by pressure appliedto the lever E, it being observed that the pressure due to theresistance of the saw is sufficient to maintain the board locked inposition on the carriage,the pressure of course increasing as theresistance increases.

It will be evident from the foregoing that the work of edging lumber bythe use of my device may be accomplished by persons not possessingspecial skill as free-hand sawyers and that the only skill required inthe work is that necessary to first adjust the board to the saw. The useof the gage H obviously facilitates such initial adjustment, so that aperson possessing little skill as a sawyer may by the use of my devicedo the work which has heretofore required special skill. Moreover, byreason of the fact that a board may be accurately edged by a single cutwith the use of my device, which frequently requires in free-hand sawinga number of cuts, my device is economical both with respect to thesawing of lumber and the time of the sawyer.

I claim as my invention- 1. An edging device comprising a movablecarriage, two gripping-levers projecting upwardly therefrom and designedto engage the opposite margins of a board, and means for simultaneouslyswinging said levers into and out of engagement with a board, said partsbeing constructed to permit the levers to be thrown downwardly below thelevel of the carriage when the device is not in use.

2. An edging device comprising two paral* lel guide-rails, a carriagesupported and sliding on said rails, two gripping-levers projectingupwardly from said carriage and designed to engage the opposite marginsof a. board, and means for simultaneously swinging said levers into andout of engagement with a board, said parts being constructed to permitthe levers to be thrown downwardly below the level of the carriage whenthe device is not in use.

3. An edging device comprising a movable carriage, provided with alongitudinal space, two upwardly-projecting gripping-levers piv oted tosaid carriage in said space and constructed to engage the oppositemargins of a board, and a connecting-rod pivoted at its opposite ends tosaid levers in such manner that both levers are simultaneously swunginto and out of engagement with the board, said levers andconnecting-rod being constructed to be thrown downwardly into saidlongitudinal space below the upper surface of the carriage.

4. An edging device comprisinga movable carriage, two gripping-leverspivoted to the carriage and projecting at their upper ends above thecarriage, and designed to engage the opposite margins of a board, aconnecting-rod pivoted at its opposite ends to said levers, and meansfor varying the distance between said levers.

, 5. An edging device comprisinga movable carriage, two gripping-leverspivoted to the carriage and projecting at their upper ends above thecarriage, said levers being designed to engage the opposite margins of aboard, a connecting-rod pivoted at its opposite ends to said levers, oneof said levers being detachably connected with the carriage and designedto be moved toward and from the other lever, and the actuating-rodhaving a corresponding detachable engagement with said lever.

6. An edging device comprising a movable carriage, two gripping-leverspivoted to the carriage and projecting at their upper ends above thecarriage, said levers being designed to engage the opposite margins of aboard, a connecting-rod pivoted at its opposite ends to said levers, insuch manner as to simultaneously swing the levers into and out ofengagement with the board, one of said levers.

dle and provided with a gage projecting laterally therefrom.

7. The combination with a saw-table provided with a cut-away space orgroove at the side of and parallel with the plane of the saw, of anedging device comprising a carriage which is movable in said groove andflush at its upper surface with the upper surface of the table, twogripping-levers pivoted to said carriage and projecting above the uppersurface of the same, and constructed to engage the opposite margins of aboard, and a connecting-rod pivoted at its opposite ends to said leversand in a manner to give equal and opposite movements to the levers, saidlevers being constructed to be thrown downwardly below the plane of theupper surface of the saw-table when the attachment is not in use.

In testimony that I claim the foregoing as my invention I affix mysignature, in presence of two Witnesses, this 15th day of September, A.D. 1900.

JOHN P. BROWN.

Witnesses:

TAYLOR E. BROWN, WILLIAM L. HALL.

